Problem while creating public hostname into Tunnel

Hi all,

I have problem when I want to create public hostname for my Cloudflare tunnel. I want to create hostname to point to my private IP address which uses HTTP as service and port 8899 as port. When I am creating public hostname it works fine for very short period of time. I noticed while public hostname is created in my DNS zone Proxyed CNAME record was created and while this record exist every works well. After one short period of time (I believe time of TTL of CNAME record). CNAME turns into A record which points to my public IP address on Internet. And content isn’t available on Internet